High-pass filter for enhancing the resolution of AC power line harmonic measurements
US5347464A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1992 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Sep 22, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/20
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An instrument employs a high-pass filter and an associated amplifier to reduce the number of Analog-to-Digital-Converter bits required to determine the amplitude of harmonics contained in digitally sampled AC (alternating current) power system voltage or current waveforms. The instrument is coupled to a power system having a line conductor and a neutral conductor for obtaining time-domain representations of the current flowing in the line conductor and the voltage difference between the line conductor and the neutral conductor. The time-domain representations are converted to frequency-domain representations by a single-chip microprocessor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.